A vacuum degassing device that achieves solid-liquid separation by utilizing vacuum suction. Under a vacuum pressure of (0.04-0.07 MPa), the liquid in the suspension passes through the filtering medium (filter cloth) and is drawn off, while the solid particles are retained by the medium, thereby separating the liquid from the solid. The structural design has the filtering section arranged along the horizontal length, enabling continuous operations such as filtration, washing, drying, and filter cloth regeneration.